MOLDEX® DECISION GUIDE FOR WELDINGSTEP 1. Answer the Following Questions:
1. Is your welding environment immediately dangerous to life and health?........................................................................................................ YES
2. Is your welding environment a confined space?........................................................................................................................................... YES
3. Does your welding environment contain less than 19.5% oxygen?............................................................................................................... YES
4. Does your welding environment have contaminant levels greater than 10 X PEL?......................................................................................... YES
5. Do you use chlorinated hydrocarbons when are welding (e.g. degreasers)?.................................................................................................. YES
6. Are there other unknown contaminants present?........................................................................................................................................ YES
If you answer YES to any of the above questions, DO NOT USE MOLDEX RESPIRATORS.
If you answer NO to ALL of the above questions, process to Step 2 and also refer to the Moldex Chemical Selection Guide*.

NONONONONONOSTEP 2. Answer the Questions and Follow the Arrows:
START
Is there a substance specific standard
for the contaminant that requires a 100
level filter (e.g. lead or Beryllium)?

N95 Pre - FilterNOIs Ozone Present?**

YESIs Ozone Present?**

P100 Filter Diskand OV or MultiGas/Vapor Smart
Cartridge
ORP100 Plus
Nuisance OV
Filter Disk

Is Oil Present?

NOYES

AnyP100Filter

ORYESR95
Pre - Filter

Is Oil Present?
YESORNO

P100 Filter Disk
and OV or MultiGas/Vapor Smart
Cartridge

N95 Filter Disk
and OV or MultiGas/Vapor Smart
Cartridge

NO

ORORAny
N100Filter

P100 Plus
Nuisance OV
Filter Disk

Any N95
Plus NuisanceOV Mask

Is Oil Present?

NO

Any R95 or
N99 Mask

YES

YESNO

Any

P100 Filter Disk

Mask

OR
Any R95, P95 orP100 Mask

WELDING SAFETY TIP
Arc welding producesozone vapors. Theaffect of UV radiationfrom the arc on theair surrounding thegas shield generatesozone.

Always wear appropriate eye and face protection.
*Moldex Chemical Selection Guide can be seen online at
http://www.moldex.com/pdf/datasheets/chemical_selection_guide.pdf**Moldex respirators may be used for Nuisance levels of ozone only.
Also check the OSHA substance specific regulations for compliance.

Note: R and P filters can be used in environments with or without oils present.
Warning: This guide may be used as an aid to select appropriate respiratory protection for specific contaminants. Because conditions at the worksite can vary substantially, a comprehensive evaluation must be made to determine the correct respiratory protection. Whencontaminants at a worksite have been identified and concentrations measured, this guide may be used to select the appropriate respirator. Only qualified professionals, familiar with the actual working conditions and knowledgeable in the benefits and the limitations ofrespiratory protection equipment, should make the selection. Before making the selection, users must also read and understand the applicable MSDS, specifically the section on respiratory protection, for the welding products they plan to use. Users must also refer to theMoldex Chemical Selection Guide before making the final selection. If the selection criteria changes, including, but not limited to, worksite conditions, consumers, or standards and regulations, a new evaluation must be made to determine the appropriate respiratory
protections. Proper use of Moldex products must be determined by the employer and must be in accordance with all applicable local, state, and federal regulations including OSHA 29CFR1910.134.

Most Popular Moldex Welding Respirators

2300N95 & 2400N95

2310 N99 & 2315 N99

2400N95 has an addedcarbon layer helps filter
out nuisance levels ofozone and OV¹.

A higher level of protection.
Filters out 99% or airborne
particulates free or oil.

¹Nuisance levels are contaminants
that do not exceed the OSHA
Permissible Exposure Limit (PEL).

4200 N95, 4600 N95, 4800 N95,
4300P95 & 4700N100
More Air, More Wear.
Patent pending Wave technology
allows easy breathing for cool
comfort and longer wear.

2700N95 & 2800N95

7000

Cloth HandyStrap for
hangable, cool comfort.
2800N95 has an addedcarbon layer helps filter
out nuisance levels ofozone and OV¹.

Easy to Wear.
Lightweight, durable andcomfortable with a wide
field of vision.

Common Welding Fumes and Suggested Moldex Respirator
ContaminantAluminum Oxide
Beryllium*
Cadmium*
Chromium, fume
Chromium, hexavalent*
Iron Oxide, fume
Lead, fume*Manganese, fume
Tin, metal oxides
Zinc Oxide, fume

No Oil Present
2300N95, 4200 N95,2700N95, 4600 N95
2730N100, 4700N100
2730N100, 4700N100
2310 (N99), 2315 (N99)2310 (N99), 2315 (N99)2310 (N99), 2315 (N99)2730N100, 4700N100
2310 (N99), 2315 (N99)2300N95, 4200 N95,2700N95, 4600 N95
2310 (N99), 2315 (N99)

No Oil, but Ozone

Oils Present

Oil and Ozone

2400N95, 2800N95, 8755, 4800 N95

2740R95, 4300 P95

2840R95, 7100+7940

8100+8940, 7100+7940
8100+8940, 7100+7940
2400N95, 2800N95, 8755, 4800 N95
2400N95, 2800N95, 8755, 4800 N95
2400N95, 2800N95, 8755, 4800 N95
7100+7940, 8100+8940
2400N95, 2800N95, 8755, 4800 N95

2360P100
2360P100
2740R95, 4300 P95
2740R95, 4300 P95
2740R95, 4300 P95
2360P100
2740R95, 4300 P95

7100+7940, 8100+8940
8100+8940
2840R95
2840R95
2840R95
7100+7940, 8100+8940
2840R95

2400N95, 2800N95, 8755, 4800 N95

2740R95, 4300 P95

2840R95

2400N95, 2800N95, 8755, 4800 N95

2740R95, 4300 P95

2840R95*These contaminants have an OSHA substance specific standard, please refer to the OSHA standard.
Warning: This chart may be used as an aid to select the appropriate respiratory protection for a specific contaminant. This chart is not all inclusive and varies depending on theconsumables used. Please refer to the consumable manufacturer’s MSDS, before selecting a respirator. Only a qualified professional, familiar with the actual working conditions
and knowledgeable in the benefits and limitations of respiratory protection equipment, should make the selection. Please refer to latest version of the Moldex Chemical Selection
Guide for help in choosing the appropriate respirator. Protection from ozone is for concentrations less than the OSHA PEL. Please refer to the warnings above for more information.
9703-721 REV F 12/14

800-421-0668 EXT. 512/550 • www.moldex.com • sales@moldex.com